Transcript No Slide Title

CHAPTER
6
Entropy
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FIGURE 6-1
The system considered in
the development of the
Clausius inequality.
6-1
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FIGURE 6-5
A cycle
composed of a
reversible and an
irreversible
process.
6-2
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FIGURE 6-6
The entropy change of an
isolated system is the sum of
the entropy changes of its
components, and is never less
than zero.
6-3
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FIGURE 6-10
The entropy of a
pure substance is
determined from
the tables (like
other properties).
6-4
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FIGURE 6-11
Schematic of
the T-s diagram
for water.
6-5
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FIGURE 6-16
On a T-S diagram,
the area under the
process curve
represents the
heat transfer for
internally
reversible
processes.
6-6
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FIGURE 6-19
The T-S diagram
of a Carnot cycle
(Example 6–6).
6-7
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FIGURE 6-36
The isentropic
relations of ideal
gases are valid
for the isentropic
processes of
ideal gases only.
6-8
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FIGURE 6-37
The use of Pr data for
calculating the final
temperature during an
isentropic process.
6-9
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FIGURE 6-39
The use of vr data for
calculating the final
temperature during
an isentropic process
(Example 6–10).
6-10
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FIGURE 6-43
Schematic and T-s
diagram for Example 6–
12.
6-11
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FIGURE 6-45
P-v diagrams of
isentropic,
polytropic, and
isothermal
compression
processes
between the
same pressure
limits.
6-12
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FIGURE 6-46
P-v and T-s diagrams for a
two-stage steady-flow
compression process.
6-13
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FIGURE 6-49
The h-s diagram for
the actual and
isentropic
processes of an
adiabatic turbine.
6-14
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FIGURE 6-51
The h-s diagram
of the actual and
isentropic
processes of an
adiabatic
compressor.
6-15
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FIGURE 6-53
Schematic and T-s
diagram for Example
6–15.
6-16
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FIGURE 6-54
The h-s diagram of the
actual and isentropic
processes of an
adiabatic nozzle.
6-17
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FIGURE 6-61
Mechanisms of
entropy transfer for a
general system.
6-18
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FIGURE 6-70
Graphical representation
of entropy generation
during a heat transfer
process through a finite
temperature difference.
6-19
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FIGURE 6-76
The electrical energy
consumed by a motor is
inversely proportional to
its efficiency.
6-20
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FIGURE 6-77
The efficiency
of an electric
motor
decreases at
part load.
6-21